Selenium

Category: nutrient — Reviewed by: WePattern Health Intelligence Engine

Pattern-based health intelligence on Selenium, cross-referenced across medications, conditions, symptoms, genetics, and lifestyle inputs. WePattern's Knowledge Graph maps over 3,500 clinically documented relationships — this entry surfaces how Selenium connects to your broader health picture.

Here's What You Should Know

Powerful antioxidant essential for thyroid function and immune health. The recommended daily intake is 55 mcg. Despite being essential, deficiency is surprisingly common — often because of soil depletion, poor absorption, or medications that block uptake.

Signs You May Be Low

Chronic low levels are linked to: Hashimoto's thyroiditis, Cancer, Heart disease, Cognitive decline.

What to Eat

The Bigger Picture

Pattern Connections — Cofactor Intelligence

Bottom Line

Selenium deficiency is underdiagnosed and often appears as vague symptoms — fatigue, poor sleep, or mood changes — that get attributed to other causes. A simple blood test clarifies the picture quickly.

🔬 Curious about the research behind these insights? Use the 'Find Supporting Research' button above to explore published studies.

Powered by WePattern — Your Personal Health Intelligence
This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations. It draws on both mainstream research and functional-medicine sources, and evidence strength varies by claim. Always consult with a qualified healthcare provider before making changes to your health routine.

Human Signal Connections

Selenium connects to the following spokes of The Human Signal — WePattern's framework for the six biological inputs every human body was designed to receive:

Learn more about The Human Signal framework.

The WePattern Lens: How We See Selenium Differently

Selenium is a thyroid and antioxidant nutrient that WePattern consistently maps in two high-priority patterns. First: selenium is required to convert T4 (the storage thyroid hormone) into T3 (the active form). This means selenium deficiency can produce classic hypothyroid symptoms — fatigue, weight gain, cold intolerance, brain fog — even when TSH is normal. WePattern tracks the selenium-iodine-zinc thyroid triangle as one of its most clinically significant patterns. Second: selenium is the cofactor for glutathione peroxidase, the enzyme that uses glutathione to neutralize oxidative damage. In autoimmune thyroid conditions (Hashimoto's), selenium has direct evidence for reducing thyroid antibodies. Brazil nuts are the most concentrated food source — one to two nuts per day can meet selenium requirements, while six or more daily can produce toxicity.

Nutrient Relationships & Cofactors

Selenium does not work in isolation. These are its key nutrient relationships:

Evidence & Sources

Questions about Selenium

Questions Only WePattern Can Answer

Related WePattern Research

How WePattern cross-references Selenium

WePattern's Pattern Health Intelligence Engine evaluates Selenium not in isolation, but in the context of your full health profile — including medications that may deplete or interact with it, conditions that alter how your body processes it, symptoms it may be driving, and lifestyle factors that amplify or suppress its effects. This cross-referenced approach surfaces patterns that single-topic searches cannot.